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Percona Distribution for MySQL 8.0.40 using Percona XtraDB Cluster (2025-01-23)

Percona Distribution for MySQL is the most stable, scalable and secure open-source MySQL distribution, with two download options: one based on Percona Server for MySQL and one based on Percona XtraDB Cluster. Install Percona Distribution for MySQL.

This release is focused on the Percona XtraDB Cluster-based deployment variation. It is based on Percona XtraDB Cluster 8.0.40-31.

Release highlights

Percona XtraDB Cluster is based on Percona Server for MySQL. Find a complete list of improvements and bug fixes in the Percona Server for MySQL 8.0.40-31 (2024-12-30) release notes.

Improvements and bug fixes provided by Oracle for MySQL 8.0.40 and included in Percona Server for MySQL are the following:

  • Changes in MySQL 8.0.33 caused queries using joins on InnoDB tables to perform worse because refactoring affected functions that were previously inline.

  • An unexpected exit ocurred if the server tried to update columns altered with NULL as the default value using the INSTANT algorithm.

  • An unexpected exit during DELETE or UPDATE operations if a column, using the INSTANT algorithm, was dropped.

  • Importing a table created under a different sql_mode sometimes led to schema mismatches, risking data corruption in secondary indexes. The fix now includes integrity checks on the imported tablespace.

  • Rebuilding tables with secondary indexes required more file I/O operations compared to MySQL 8.0.26, which slowed down query performance.

Find the complete list of bug fixes and changes in the MySQL 8.0.40 Release Notes.

Supplied components

Review each component’s release notes for What’s new, improvements, or bug fixes. The following is a list of the components supplied with the Percona XtraDB Cluster-based variation of the Percona Distribution for MySQL:

Component Version Description
Percona XtraBackup 8.0.35-32 An open-source hot backup utility for MySQL-based servers that doesn’t lock your database during the backup.
HAProxy 2.8.11 A high-availability and load-balancing solution for Percona XtraDB Cluster. This is a default proxy.
ProxySQL 2.7.1-1 A high performance, high-availability, protocol-aware proxy for MySQL.
Percona Toolkit 3.7.0 The set of scripts to simplify and optimize database operation.
relication_manager.sh 1.0 A tool to manage multi-source replication between multiple Percona XtraDB Cluster clusters.